Motor-pump fire-hydrant.



Patented July 16, 1918.

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HUGH THOMAS DUNN, OF NEW YORK, N. Y.

MOTOR-PU1VIIP FIRE-HYDRANT.

Specification of Letters Patent.

Application filed August 7, 1914. Serial No. 55,715.

To all whom it may concern Be it known that I, HUGH TnoMAs DUNN, a citizen of the United States, and a resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Motor-Pump Fire- Hydrant-s, of which the following is a speciflcation.

The present invention relates to improvements in fire hydrants, and has for its primary object to dispense with the ordinary fire engine, the water being forced from the hydrant by a pump located at the hydrant, the power for the pump being set in operation by the water flowing from the main into the hydrant.

The figure in the drawing is a longitudinal sectional view of a fire hydrant constructed in accordance with the preferred form of my invention.

The reference character 1 designates a lower section of a hydrant, the section being attached to the main in any desired manner.

Secured on the section 1 is a second section 2, and above section 2 .is a housing or hood 3. At the base of the lower section is a valve seat l cooperating with a valve head 5, and projecting upwardly from the valve-head is a valve stem 6, the upper end of which is screw-threaded as at 6. The screwthreaded extremity of the valve stem 6 is adapted for threaded engagement with a yoke 7 the upper squared extremity 7 of which projects through, the top wall of the housing or box 3, for a purpose to be hereinafter described.

Mounted in the upper section 2 is an elec tric motor 8, and extending downwardly therefrom and surrounding the valve stem 6 is a hollow shaft 9 upon the lower end of which is mounted a rotary pump 10, rest ing on a. spider bearing 10.

The motor is supplied with current from any suitable source by means of the conductors 11. passing through pipe 12, and connected in the circuit are an automatic switch 13 and a. manually operated switch 14.

Mounted in-a perforated cylindrical mem ber 15 is a float 16 which is connected by means of the vertically-extended float rod 17 to the automatic switch 13, said rod 17 being guided in its vertical movement by the guides 18.

Adjustably secured to the float rod 17 is a Washer 19, said washer being maintained in its adjusted position by a nut or like member 20. This washer l9 closes a passage in the partition 21 for the float rod 17. 9 is a stuffing box between the partition 21 and the shaft 9.

In operation, the hose is attached to the nozzle 22 and when the hose has been attached, a wrench is engaged with the squared end 7 of the yoke 7 to turn the latter and open the valve 5.

When the valve 5 has been opened, water enters the cylindrical member 1 and the float 16 rises, thus operating to close the motor circuit by means of the automatic switch 13. This causes the motor 8 in the section 2, and resting on the bearing 8 and connected to the hollow shaft 9, to set the pump in operation, whereupon the water is drawn from the main and forced from the hydrant under pressure.

The pressure at which the water leaves the hydrant is indicated by the gages 23 on the nozzles 22.

If the pressure be too great, the relief valves 24 below the nozzles are opened, thus permitting a portion of the water to enter the water mains by means of return pipes 25, only one of which is shown. The relief valves may be so positioned as to discharge this sin-plus pressure directly to the atmosphere if so desired. it being understood that said valves 24 are of the threewa y type.

If on the other hand; more pressure is needed. the manually operated switch 14: is operated to supply the motor with more our rent, thus increasing the speed thereof and consequently increasing the speed of the rotary pump.

Hand holes 26 are provided in the section 2 and housing 3 for the purpose of allowing operation of the switch 14, filling the oil receptacle 27 which serves to lubricate the several movable parts of the motor, and

pump, etc.

28 is an electric meter. 29 are drain holes to prevent freezing of water in the hydrant.

From the foregoing, it will be seen that the present invention provides a fire hydrant by means of which the pressure of the main supply may be greatly increased without the use of separate pumping mechanism such as fire engines, and that, in manner which is automatic upon the turning on of the water from the main.

Claims:

1. A hydrant comprising superposed sections, the lowermost section containing a pump, the section above containing a motor, and a section above the last-named section,

a valve-head regulating the flow of water into the lower-most. section, a valve-stem extending from the valve head into the uppermost section, a hollow shaft surrounding a portion of the valve stem and attached to the pump and motor, and a float in the lower-most section adapted, under the action of the water entering the lower-most section, to energize the motor.

2. A hydrant comprising superposed sections, the lowermost section containing a pump, the section above containing a motor, and a section above the lastnamed section a valve-head regulating the flow of water into the lowermost section, a valve-stem extending from the valvehead into the uppermost section, a hollow shaft surrounding a portion of the valve-stem and attached to the pump and motor, a float in the lowermost section adapted, under the action of the water entering the lowermost section, to energize the motor, and manual means for additionally energizing the motor.

3. A hydrant comprising superposed sections, the lowermost section containing a pump, the section above containing a motor, and a section above the last named section a valve-head regulating the flow of water 35 into the lowermost section, a valve-stem extending from the valve-head into the uppermost section, a hollow shaft surrounding a portion of the valve-stem and attached to the pump and motor, a float in the lowermost section, adapted, under the action of the water entering the lowermost section, to energize the motor, manual means for additionally energizing the motor and means preventing undesirable pressure in the hydrant discharge. 7

Having thus described my invention I herewith affix my signature in the presence of two witnesses.

HUGH THOMAS DUNN.

WVitnesses:

GUGTAVE HUMBEUTEL, JOSEPH J. ENGELS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of IEatents, Washington, D. G. 

